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kimtaehyung29032004
2 năm trước
cho tam giác ABC có AI là đường phân giác trong,AB=3cm;AC=4cm;BC=14cm a)Tính độ dài đoạn thẳng IB,IC b)Cho AK là đường phân giác ngoài.Tính độ dài KB,KC c)Tính độ dài đoạn thẳng IK
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